Drilling-machine



(No Model.)

E. ALLEN 8v D. S. HENRIB.

DRILLING MAGHNE.

No. 357,807. Patent-ed Feb. 15, 1887.

INVBNTOR I K2 ATTRNEYS.

N. PETERS, Phmmhogmphm. washingwn. n. c.

UNITED STATES PATENT OFFICE.

EDGAR ALLEN AND DANIEL S. HENRIE, OF THREE RIVERS, MICHIGAN.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Pat-ent No. 357,807, dated February 15, 1887.

Application filed May 29, 1886. Serial No. 203,602. (No xno'lel.)

To @ZZ whom it may concern:

Be it known that we, EDGAR ALLEN and DANIEL S. HENEIE, of Three Rivers, in the county of St. Joseph and State of Michigan, have invented a new and Improved Drilling- Machine, of which the following is a full, clear, and exact description.

Our invention relates to the construction of a drilling-machine wherein the drill-spindle is mounted so as to carry the drill in yielding connection with the material to be operated upon, the arrangement being such that the pressure may be varied in accordance with the requirements of the case; and the invention consists of certain novel constructions and combinations, to be hereinafter described, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of reference indicate corresponding parts in both the figures.

Figure 1 is a side view of our drilling-machine, certain ofthe supporting-brackets being cut away to disclose the construction of the machine; and Fig. 2 is a face view of the machine, the sleeve in which the drill-spindle rides being shown in section.

In constructing such a machine as is illustrated in the drawings above referred to we provide a vertical post or standard, 10, to which there is secured a ibrwardlyextending frame, 11, consisting of arms 12 12 and a vertical strip, 13, the arms 12 being formed with apertures near their outer ends. The drill-spindle 14 is arranged to tit closely within the ap erture of the lower extending arm 12, and ex tends through the center of the aperture formed in the upper arm, being, however, surrounded at this point by a cylindrical casing, 15, which tits closely within the aperture in the upper arm 12. The spindle 14 is provided with a collar, 16, and above1 this collar there is arranged a coil-spring, 17, which extends upward from said collar to the under side of an annular plug, 8, through which the spindle passes, the plug being threaded to engage with an internal thread formed at the upper end of the cylindrical casing 15. c

Upon the rear of the case 15 there is a rack, 18, that is engaged by avpinion or small gearwheel, 197 carried byashaft, 20, that is mounted in bearings formed in the upper arm 12 and provided'with a hand-wheel, 21, the obj ect of this construction being to provide an apparatus by which the tension of the spring 17 may be varied to meet the requirements of the size of drillwhich it is desired to use, the gear or pinion 19being held against any retrograde motion by a pawl, 7, that is arranged as best shown in Fig. 1.

The drill-spindle carries a loose beveled pinion, 22, that is engaged by a gear, 23, said gear being carried by a shaft, 24, that is mounted in proper bearings formed in a bracket, 25, that extends outward from one side of the frame 1l. Motion is imparted to the shaft 24, and consequently to the gear 23, by a crank arm or wheel, 35, and thence to the drillspindle through the medium of the pinion 22.

The table 26, upon which the material to be drilled is supported, is carried by a bracket, 27, that is adjustably connected to a vertical shaft, 28, which is mounted in brackets 29 30, that extend forward from the lower end of the post 10, the lower bracket, 30, being provided with bearings, in which a shaft, 3l, having a lever, 32, is mounted. The shaft 3l carries a small gear or pinion, 83, and this gear or pinion engages with a rack, 34, formed upon the lower end of the vertical shaft 28.

In operation the hand-wheel 21 is turned to a position to impart a proper tension to the spring 17, and the material to be drilled having been placed upon the table 26, the lever 32 is depressed, and the material thereby raised against the point of the drill40, which at this time is revolving rapidly, motion being inlparted to the drill, as hereinbefore set forth. y Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a drilling-machine, the combination, with the frame and the operating mechanism, ofthe adjustable spindlecasing having a rack and the drillAspindle having a vertically-yield ing movement,substantially as set forth.

2. In a drilling-machine, the combination, with a drill-spindle carrying a collar, of a spindle-iuclosing case formed with a rack, 18, and provided with a plug, 8, a spring, 17, a pinion or gear, 19, and an operating mechanism, and an adj ustably-mounted table, substant-ially as described.

EDGAR ALLEN. DANIEL S. HENRIE. Vitnesses: Y A. C. TITUs,

HENRY L. KEMBERLING.

IOO 

